Open society, a concept originally developed by philosopher Henri Bergson and then by Austrian and British philosopher Karl Popper

Free content, any kind of functional work, artwork, or other creative content, which meets the free content definition, having no significant legal restriction relative to people's freedom to use, distribute copies, modify, and to distribute derived works of the content

Creative Commons, a non-profit organization headquartered in San Francisco, California, United States devoted to expanding the range of creative works available for others to build upon legally and to share